Eur. Phys. J. B (2012) 85: 410
https://doi.org/10.1140/epjb/e2012-30579-x

Regular Article

Charge and spin configurations in the coupled quantum dots with Coulomb correlations induced by tunneling current

¹ P.N. Lebedev Physical institute of RAS, 119991 Moscow, Russia
² Moscow State University, Department of Physics, 119991 Moscow, Russia

^a e-mail: vmantsev@spmlab.phys.msu.ru

Received: 11 July 2012
Received in final form: 15 August 2012
Published online: 17 December 2012

Abstract

We investigated the peculiarities of non-equilibrium charge states and spin configurations in the system of two strongly coupled quantum dots (QDs) weakly connected to the electrodes in the presence of Coulomb correlations. We analyzed the modification of non-equilibrium charge states and different spin configurations of the system in a wide range of applied bias voltage and revealed well pronounced ranges of system parameters where negative tunneling conductivity appears due to the Coulomb correlations.